|
| ||
|
|
||
Catalytic Asymmetric Aldol Reaction (catalytic + asymmetric_aldol_reaction)
Selected AbstractsChemInform Abstract: Construction of Contiguous Tetrasubstituted Chiral Carbon Stereocenters via Direct Catalytic Asymmetric Aldol Reaction of ,-Isothiocyanato Esters with Ketones.CHEMINFORM, Issue 16 2010Tatsuhiko Yoshino Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Direct Catalytic Asymmetric Aldol Reaction of ,-Keto Esters with Formaldehyde Promoted by a Dinuclear Ni2 -Schiff Base Complex.CHEMINFORM, Issue 1 2010Shinsuke Mouri Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] One-Pot Synthesis of ,-Diazo-,-hydroxyesters under Phase-Transfer Catalysis and Application to the Catalytic Asymmetric Aldol Reaction.CHEMINFORM, Issue 19 2004Shigeru Arai Abstract For Abstract see ChemInform Abstract in Full Text. [source] Direct Catalytic Asymmetric Aldol Reaction of Hydroxyketones: Asymmetric Zn Catalysis with a Et2Zn/Linked-BINOL Complex.CHEMINFORM, Issue 26 2003Naoya Kumagai Abstract For Abstract see ChemInform Abstract in Full Text. [source] Catalytic Asymmetric Aldol Reactions of Enolizable Carbon Pronucleophiles with Formaldehyde and Ethyl GlyoxylateADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 4-5 2007Isao Fukuchi Abstract We herein describe novel catalytic asymmetric aldol reactions of acidic carbon pronucleophiles including ,-keto esters and specific ketones with reactive electrophiles such as formaldehyde and ethyl glyoxylate. In the presence of a catalytic amount of chiral Pd(II)-BINAP complexes, the hydroxymethylation of ,-keto esters with paraformaldehyde or formalin was examined, and the corresponding adducts were obtained in good yields with good to high enantioselectivity (ca. 86,% ee). In some cases, the similar Pt(II) complex also worked well to give the products with better enantioselectivity. Furthermore, these complexes were found to promote the aldol reactions of less acidic ketones, and ethyl glyoxylate underwent reaction with 3-coumaranone and ,-tetralone, affording the aldol products with a significant level of enantioselectivity of up to 83,% ee. [source] ChemInform Abstract: Direct Catalytic Asymmetric Aldol Reactions of Aldehydes.CHEMINFORM, Issue 28 2002Anders Boegevig Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Direct Catalytic Asymmetric Aldol Reactions Promoted by Novel Heterobimetallic Catalysts Possessing Strong Broensted Base: A New Strategy for the Development of Lewis Acid,Broensted Base Bifunctional Catalysts.CHEMINFORM, Issue 32 2001Naoki Yoshikawa Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] Catalytic Asymmetric Aldol Reactions of Enolizable Carbon Pronucleophiles with Formaldehyde and Ethyl GlyoxylateADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 4-5 2007Isao Fukuchi Abstract We herein describe novel catalytic asymmetric aldol reactions of acidic carbon pronucleophiles including ,-keto esters and specific ketones with reactive electrophiles such as formaldehyde and ethyl glyoxylate. In the presence of a catalytic amount of chiral Pd(II)-BINAP complexes, the hydroxymethylation of ,-keto esters with paraformaldehyde or formalin was examined, and the corresponding adducts were obtained in good yields with good to high enantioselectivity (ca. 86,% ee). In some cases, the similar Pt(II) complex also worked well to give the products with better enantioselectivity. Furthermore, these complexes were found to promote the aldol reactions of less acidic ketones, and ethyl glyoxylate underwent reaction with 3-coumaranone and ,-tetralone, affording the aldol products with a significant level of enantioselectivity of up to 83,% ee. [source] | ||||||||||